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Example 21 with TokenStreamRewriter

use of org.antlr.v4.runtime.TokenStreamRewriter in project antlr4 by antlr.

the class TestTokenStreamRewriter method testDistinguishBetweenInsertAfterAndInsertBeforeToPreserverOrder2.

@Test
public void testDistinguishBetweenInsertAfterAndInsertBeforeToPreserverOrder2() throws Exception {
    LexerGrammar g = new LexerGrammar("lexer grammar T;\n" + "A : 'a';\n" + "B : 'b';\n" + "C : 'c';\n");
    String input = "aa";
    LexerInterpreter lexEngine = g.createLexerInterpreter(new ANTLRInputStream(input));
    CommonTokenStream stream = new CommonTokenStream(lexEngine);
    stream.fill();
    TokenStreamRewriter tokens = new TokenStreamRewriter(stream);
    tokens.insertBefore(0, "<p>");
    tokens.insertBefore(0, "<b>");
    tokens.insertAfter(0, "</p>");
    tokens.insertAfter(0, "</b>");
    tokens.insertBefore(1, "<b>");
    tokens.insertAfter(1, "</b>");
    String result = tokens.getText();
    String expecting = "<b><p>a</p></b><b>a</b>";
    assertEquals(expecting, result);
}
Also used : CommonTokenStream(org.antlr.v4.runtime.CommonTokenStream) LexerInterpreter(org.antlr.v4.runtime.LexerInterpreter) LexerGrammar(org.antlr.v4.tool.LexerGrammar) ANTLRInputStream(org.antlr.v4.runtime.ANTLRInputStream) TokenStreamRewriter(org.antlr.v4.runtime.TokenStreamRewriter) BaseJavaTest(org.antlr.v4.test.runtime.java.BaseJavaTest) Test(org.junit.Test)

Example 22 with TokenStreamRewriter

use of org.antlr.v4.runtime.TokenStreamRewriter in project antlr4 by antlr.

the class TestTokenStreamRewriter method testInsertThenReplaceSameIndex.

@Test
public void testInsertThenReplaceSameIndex() throws Exception {
    LexerGrammar g = new LexerGrammar("lexer grammar T;\n" + "A : 'a';\n" + "B : 'b';\n" + "C : 'c';\n");
    String input = "abc";
    LexerInterpreter lexEngine = g.createLexerInterpreter(new ANTLRInputStream(input));
    CommonTokenStream stream = new CommonTokenStream(lexEngine);
    stream.fill();
    TokenStreamRewriter tokens = new TokenStreamRewriter(stream);
    tokens.insertBefore(0, "0");
    tokens.replace(0, "x");
    stream.fill();
    // supercedes insert at 0
    String result = tokens.getText();
    String expecting = "0xbc";
    assertEquals(expecting, result);
}
Also used : CommonTokenStream(org.antlr.v4.runtime.CommonTokenStream) LexerInterpreter(org.antlr.v4.runtime.LexerInterpreter) LexerGrammar(org.antlr.v4.tool.LexerGrammar) ANTLRInputStream(org.antlr.v4.runtime.ANTLRInputStream) TokenStreamRewriter(org.antlr.v4.runtime.TokenStreamRewriter) BaseJavaTest(org.antlr.v4.test.runtime.java.BaseJavaTest) Test(org.junit.Test)

Example 23 with TokenStreamRewriter

use of org.antlr.v4.runtime.TokenStreamRewriter in project antlr4 by antlr.

the class TestTokenStreamRewriter method testReplaceRangeThenInsertAfterRightEdge.

@Test
public void testReplaceRangeThenInsertAfterRightEdge() throws Exception {
    LexerGrammar g = new LexerGrammar("lexer grammar T;\n" + "A : 'a';\n" + "B : 'b';\n" + "C : 'c';\n");
    String input = "abcccba";
    LexerInterpreter lexEngine = g.createLexerInterpreter(new ANTLRInputStream(input));
    CommonTokenStream stream = new CommonTokenStream(lexEngine);
    stream.fill();
    TokenStreamRewriter tokens = new TokenStreamRewriter(stream);
    tokens.replace(2, 4, "x");
    tokens.insertAfter(4, "y");
    String result = tokens.getText();
    String expecting = "abxyba";
    assertEquals(expecting, result);
}
Also used : CommonTokenStream(org.antlr.v4.runtime.CommonTokenStream) LexerInterpreter(org.antlr.v4.runtime.LexerInterpreter) LexerGrammar(org.antlr.v4.tool.LexerGrammar) ANTLRInputStream(org.antlr.v4.runtime.ANTLRInputStream) TokenStreamRewriter(org.antlr.v4.runtime.TokenStreamRewriter) BaseJavaTest(org.antlr.v4.test.runtime.java.BaseJavaTest) Test(org.junit.Test)

Example 24 with TokenStreamRewriter

use of org.antlr.v4.runtime.TokenStreamRewriter in project antlr4 by antlr.

the class TestTokenStreamRewriter method testReplaceThenDeleteMiddleIndex.

@Test
public void testReplaceThenDeleteMiddleIndex() throws Exception {
    LexerGrammar g = new LexerGrammar("lexer grammar T;\n" + "A : 'a';\n" + "B : 'b';\n" + "C : 'c';\n");
    String input = "abc";
    LexerInterpreter lexEngine = g.createLexerInterpreter(new ANTLRInputStream(input));
    CommonTokenStream stream = new CommonTokenStream(lexEngine);
    stream.fill();
    TokenStreamRewriter tokens = new TokenStreamRewriter(stream);
    tokens.replace(1, "x");
    tokens.delete(1);
    String result = tokens.getText();
    String expecting = "ac";
    assertEquals(expecting, result);
}
Also used : CommonTokenStream(org.antlr.v4.runtime.CommonTokenStream) LexerInterpreter(org.antlr.v4.runtime.LexerInterpreter) LexerGrammar(org.antlr.v4.tool.LexerGrammar) ANTLRInputStream(org.antlr.v4.runtime.ANTLRInputStream) TokenStreamRewriter(org.antlr.v4.runtime.TokenStreamRewriter) BaseJavaTest(org.antlr.v4.test.runtime.java.BaseJavaTest) Test(org.junit.Test)

Example 25 with TokenStreamRewriter

use of org.antlr.v4.runtime.TokenStreamRewriter in project antlr4 by antlr.

the class TestTokenStreamRewriter method testInsertThenReplaceLastIndex.

@Test
public void testInsertThenReplaceLastIndex() throws Exception {
    LexerGrammar g = new LexerGrammar("lexer grammar T;\n" + "A : 'a';\n" + "B : 'b';\n" + "C : 'c';\n");
    String input = "abc";
    LexerInterpreter lexEngine = g.createLexerInterpreter(new ANTLRInputStream(input));
    CommonTokenStream stream = new CommonTokenStream(lexEngine);
    stream.fill();
    TokenStreamRewriter tokens = new TokenStreamRewriter(stream);
    tokens.insertBefore(2, "y");
    tokens.replace(2, "x");
    String result = tokens.getText();
    String expecting = "abyx";
    assertEquals(expecting, result);
}
Also used : CommonTokenStream(org.antlr.v4.runtime.CommonTokenStream) LexerInterpreter(org.antlr.v4.runtime.LexerInterpreter) LexerGrammar(org.antlr.v4.tool.LexerGrammar) ANTLRInputStream(org.antlr.v4.runtime.ANTLRInputStream) TokenStreamRewriter(org.antlr.v4.runtime.TokenStreamRewriter) BaseJavaTest(org.antlr.v4.test.runtime.java.BaseJavaTest) Test(org.junit.Test)

Aggregations

ANTLRInputStream (org.antlr.v4.runtime.ANTLRInputStream)43 CommonTokenStream (org.antlr.v4.runtime.CommonTokenStream)43 LexerInterpreter (org.antlr.v4.runtime.LexerInterpreter)43 TokenStreamRewriter (org.antlr.v4.runtime.TokenStreamRewriter)43 BaseJavaTest (org.antlr.v4.test.runtime.java.BaseJavaTest)43 LexerGrammar (org.antlr.v4.tool.LexerGrammar)43 Test (org.junit.Test)43